A simple Brainfuck interpreter implemented in Scala, built primarily for the purpose of trying out Scala CLI.
# Run the interpreter
scala-cli run . -- "program"
# Run tests
scala-cli test .You can find example programs in the examples/ directory and run them using:
scala-cli run . -- "$(< path-to-example)"All examples are sourced from wikipedia.org and brainfuck.org.
The language consists of eight single-character commands:
| Command | Description |
|---|---|
> |
Increment the data pointer by one (to point to the next cell to the right). |
< |
Decrement the data pointer by one (to point to the next cell to the left). |
+ |
Increment the byte at the data pointer by one. |
- |
Decrement the byte at the data pointer by one. |
. |
Output the byte at the data pointer. |
, |
Accept one byte of input, storing its value in the byte at the data pointer. |
[ |
If the byte at the data pointer is zero, then instead of moving the instruction pointer forward to the next command, jump it forward to the command after the matching ] command |
] |
If the byte at the data pointer is nonzero, then instead of moving the instruction pointer forward to the next command, jump it back to the command after the matching [ command. |
All other characters are ignored and can be used for comments.